In November, the Regiment was ordered to report at Camp Curtin, which most Pennsylvania soldiers remember so well as overlooking Harrisburg. Here the enlistments were continued, and on the 23d of December the officers and men were mustered as a regiment into the service of the United States for three years, there being at the time nine companies, "H" omitted.
Two days previous to the muster, the Regiment was presented by Governor Curtin, on behalf of the State, with the Colors.
Strength of Companies:
| Officers. | Serg'ts. | Corp'ls. | Privates. | Music'ns. | Wagon's. | Total. | ||
| A | 3 | 5 | 8 | 77 | 2 | 1 | 96 | |
| B | 3 | 5 | 5 | 44 | 3 | 1 | 61 | |
| C | 3 | 5 | 8 | 67 | 2 | 1 | 86 | |
| D | 3 | 5 | 3 | 67 | 2 | 1 | 81 | |
| E | 3 | 5 | 6 | 73 | 2 | 1 | 90 | |
| F | 3 | 4 | 4 | 70 | 2 | 1 | 84 | |
| G | 3 | 5 | 2 | 70 | 2 | 1 | 83 | |
| I | 3 | 5 | 8 | 75 | 2 | 1 | 94 | |
| K | 3 | 5 | 8 | 72 | 2 | 1 | 91 | |
| —— | ||||||||
| Total officers and men, | 766 | |||||||
Murray's selection for the Colonelcy of the 84th may be attributed to the part which he took as an officer in the Mexican War, where he did honorable and praiseworthy service.
Several of the men had responded promptly to the first call for three months' troops, and were now on their way for the longer term.
Off to the "Front."
On the 31st of December, the last day of the year, 1861, acting upon orders received to report at Hancock, Maryland, the Regiment left Harrisburg at two o'clock in the afternoon, on a train made up of twenty-one cars, for Hagerstown, where it arrived at six o'clock in the evening of that day.